Electric motor.



Patented lan. 9, |900.

3 Sheets-Sheet I.

H. LEITNER.

ELECTRIC MOTOR.

(Application med May 18, 1899.)

(No Model.)

Patented 1an. 9, |900.

' H. LEITNER.

ELECTRIC MOTOR.

(Application filed May 18, v1899.)

3 Sheets Sheet 2 (No Model.)

a mams Ferias co.. PHOTO-umu, MsnzNuToN. n c.

3 Shees-vShqet 3.

Patented 1an. 9, |900. H. LEITNER.

ELECTRIC MOTOR. Application med my is, 1899.)

(No Model.)

I. wwfzzrres UNITED STATES PATENT OFFICE.

HENRY LEITNER, OF LONDON, ENGLAND.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 641,125, dated January 9, 1900.

Application filed May I6, 1899. Serial No. 717,064. (No model.)

T0 @ZZ whom t may ccnccrn:

Be it known that I, HENRY LEITNER, a citi- Zen of England, residing at No. 207 Piccadilly, London, England, have invented certain new and useful Improvements in Electric Motors, (for which I have made application for a patent in Great Britain, No. 27,453, dated December 29, 1898,) of which the following is a specification.v

My invention relates to an electric motor constructed as I shall describe, referring to the accompanying drawings.

Figure l is a vertical section, partly in elevation, of a motor according to my invention. Fig. 2 isa side elevation, part of the left half of the casing being cut away to show part of the interior; and Fig. 3 is a diagram indicating the electric connections between the field- Inagnet coils.

On a shaft a are fixed the field-magnets, consisting of iron laminae 4,cut so as to present six poles h, three of which are coiled with insulated wire c, the alternate poles having no coils. All the laminre are clamped on the shaft between a colla-rd and a nut e and prevented from turning by a key f. The arma ture consists of iron laminae g, serrated inside and outside to receive insulated wires h. These laminas are bound together by copper rivets passing through them, and to the laminse are attached,rby screws c', two side frames j 7e, which are connected together bybolts l and which have projecting studs at intervals bearing against the laminse g.

Both side frames have bosses containing ball-bearings which have four rows of balls m, separated by rings n, bearing on the shaft a, and another row of balls 0 to take end thrust. VThe side frame 7e has outside the bearing-boss another hollow boss, in which are iiXed insulated the commutator-segments p. On the shaft a are fixed the brush-holders r, which are themselves connected to rings s and t. Other rings a and 'u are connected by wires led through a bore of the shaft d to the ring d, through lateral holes of which they branch tothe coils c.

in many different ways, and the commutatorbrushes are connected by wires to the rings s and t, while the magnet-coils are connected by wires to the rings u and o.

Obviously the shaft a and magnets may be stationary while the armature, with its side frames, revolves, or the armature and side frames may be stationary while the shaft and magnets revolve, or both the armature and the magnets may revolve in opposite direc-l tions.

Having thus described the nature of this invention and the best means I know of car# rying the same into practical effect, Iclain1= The combination, in an electric motor, of a shaft having a bore, rings xed on the end of the shaft, laminated iield-magnets fixed to the shaft and having an even number of polar extensions the alternate ones of which have windings connected with some of said rings by conductors passing through the bore of the shaft, a laminated ring-armature surrounding the field magnets, side frames loosely mounted on the shaft and between which the ring-armature is held, commutator-segments arranged on one of the side frames and connected by conductors with the armature-coils, and commutator-brushes arranged on the shaft and connected with some of said rings on the shaft, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnessesb HENRY LEITNER.

. Witnessesi A. M. GLASS, Fiano C. Hannie. 

